Should I grease my icon rxt leaf pack

I just emailed the company I bought the icon rxt leaf pack from and asked about grease able shackles. They responded and told me “The RXT bushings are natural rubber like stock so they actually should not need to be greased“ Well go figure they started squeaking about 3 hours later 212 miles into the having them on. So are they right? And if not what’s a good rec for grease able shackles/bolts for all 3? TIA

 

Factory bushings, and any rubber bushings don't need grease. Make sure they were only tightened with the weight of the truck on them and the truck on the ground.

 

Make sure the leaf hanger bolts are still tight. Mine squeaked until the bolt backed out. Almost lost the axle on the trail...